11221990931 has 2 divisors, whose sum is σ = 11221990932. Its totient is φ = 11221990930.

The previous prime is 11221990849. The next prime is 11221990951. The reversal of 11221990931 is 13909912211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11221990931 - 2¹⁰ = 11221989907 is a prime.

It is a super-3 number, since 3×11221990931³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (11221990951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610995465 + 5610995466.

It is an arithmetic number, because the mean of its divisors is an integer number (5610995466).

Almost surely, 2^11221990931 is an apocalyptic number.

11221990931 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221990931 is an equidigital number, since it uses as much as digits as its factorization.

11221990931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 11221990931 in words is "eleven billion, two hundred twenty-one million, nine hundred ninety thousand, nine hundred thirty-one".